A Contactless Slipring System Based on Axially Traveling Magnetic Field

作者：Abdolkhani Ali^*; Hu Aiguo Patrick

来源：IEEE Journal of Emerging and Selected Topics in Power Electronics, 2015, 3(1): 280-287.

DOI：10.1109/JESTPE.2014.2323363

• Contactless slipring
• magnetic design
• polyphase modeling
• rotary applications
• wireless power transfer

It is a preferable method to transfer power wirelessly using contactless slipring systems for rotary applications. The current single or multiple-unit single-phase systems often have limited power transfer capability, so they may not be able to meet the load requirements. This paper presents a contactless slipring system based on axially traveling magnetic field that can achieve a high output power level. A new index termed mutual inductance per pole is introduced to simplify the analysis of the mutually coupled poly-phase system to a single-phase basis. Both simulation and practical results have shown that the proposed system can transfer 2.7 times more power than a multiple-unit (six individual units) single-phase system with the same amount of ferrite and copper materials at higher power transfer efficiency. It has been found that the new system can achieve about 255.6 W of maximum power at 97% efficiency, compared to 68.4 W at 90% of a multiple-unit (six individual units) single-phase system.

• 出版日期2015-3